Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997balta...6..290k&link_type=abstract
Baltic Astronomy, vol. 6, p. 290
Astronomy and Astrophysics
Astronomy
2
Astronomical Catalogs, Astrography, Stellar Motions, Astronomical Photography, Sky Surveys (Astronomy), Astrometry, Random Errors, Photographic Plates, Coordinate Transformations
Scientific paper
Observations performed within the framework of the Carte du Ciel international project more than 70 years ago provide an excellent first epoch for the extensive determination of proper motions. Combination of the Astrographic Catalogues (ACs) with modern photographic surveys will yield high precision proper motions for four million stars. The aim of the astrometric reduction is to obtain the positions of the AC stars with respect to the FK5 reference frame. Systematic errors for the telescope were carefully investigated and accounted for, whenever possible. Final random errors of positions vary by zone; 0.2-0.5 arcsec appears to be a realistic estimate. Proper motions to be derived from ACs and present-day surveys of matching quality are expected to have an accuracy of 4-6 mas/year.
Kuimov Konstantin V.
Kuzmin Andrei V.
Nesterov V. V.
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